Cisco 4000-M Replacement Manual page 3

Warning
activity.
Warning
detach the end away from the router first to avoid possible electric shock. Network hazardous
voltages also are present on the system card in the area of the BRI port (RJ-45 connector), regardless
of when power is turned off.
Overview of the Cisco 4000 Series Power Supplies
Figure 1 illustrates the AC and DC power supplies.Figure 2 shows an AC power supply mounted in
a Cisco 4000 series router. Table 1 contains the AC power supply specifications and Table 2 contains
the DC power supply specifications.
Figure 1
AC power supply
Figure 2
Four port
BRI
module
Do not work on the system or connect or disconnect cables during periods of lightning
Network hazardous voltages are present in the BRI cable. If you detach the BRI cable,
Cisco 4000 Series AC and DC Power Supplies
Rear View of Cisco 4000 Series Router Showing Power Supply Location
10BaseT
ports
Slot 3
BRI ports
ISDN
BRI
TX
PORT-1
RX
PORT-7 PORT-6
PORT-5 PORT-4
AUI
LNK
POL
10BASE-T
PORT-0
TX
PORT-3 PORT-2 RX
PORT-1 PORT-0
AUI
7 6 5
4 3 2 1
0 LNK
POL
Ethernet module
LEDs
Auxiliary port
Overview of the Cisco 4000 Series Power Supplies
DC power supply
Chassis Serial interface ports
release screw
AUI
Serial
ports Slot 2
module
ETHERNE T AUI
P-3 P-2
Console port
Replacing the Cisco 4000 Series Power Supply
Slot 1
P-3
P-2
P-1
P-0
P-1` P-0
Power
On/off switch
3